The Collaborative International Dictionary of English v.0.48:

Odin \O"din\, prop. n. [Icel. ?; prob.akin to E. wood, a. See
   Wednesday.] (Northern Mythol.)
   The supreme deity of the Scandinavians; -- the same as
   Woden, of the German tribes.
   [1913 Webster]

         There in the Temple, carved in wood,
         The image of great Odin stood.           --Longfellow.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Odin
    n 1: (Norse mythology) ruler of the Aesir; supreme god of war
         and poetry and knowledge and wisdom (for which he gave an
         eye) and husband of Frigg; identified with the Teutonic
         Wotan